Carburetor



June 27, 1933.,

H. KOWALEWSKI lCARBURE'IOR Filed Sept. 2, 1930 f i A E v. r.

Patented Jui-ie 27, reas I 315,427

Y TENT FFICE IIEEERBELILv KOVTALEVJSKI, OF WNNXPEG, MANITOBA, CANADA.

j Y CARBURETOR Application ledsepteinber 2, 193G, Serial No. 479,184, and in Germany September 2, 1929.

My invention relates to carburetors for supply. Threadably secured in the upper internal combustion engines one of the obflanged portion ofthe casing 1 is a cylinder jects of my invention being to provide a can 6 having slidable therein an inner cylinderl, bureting device for internal combustion en- 7 carrying headed stem 8 which is disposed 5 gines formed with a primary mixing chainin the bore of the valve 4 and maintained ber heated by communication with the exnormally positioned to limit the chamberv haust from the engine and communicating to the desired size. lnterposed between the with a main air passage to secure thorough inner cylinder 7 and the upper end of `the vaporization of the fuel before mixing with outerv cylinder 6 is a spring 9 adjusted to the main air supply, and further to provide maintain the stem 8 normally depressed. To 60 an insulated covering for the primary inixthe head of the stem 8 attaches a cable 10 ing chamber to avoid heating` the main air which extends through an opening provided Supply i in the end of the outer cylinder 6 and is car- A further object of my invention is to proiied into a convenient position to be manipul5 vide an improved fuel feed and valve conlated by the operator to temporarily raise 65 trol actuated by movement of vthe engine the stem 8 and increase the capacity of the eliminating the float as in common use and fuel chamber 5 for priming purposes. v elfectingamarked saving in gasoline or other Intermediately formed in the valve 4 is fuel and further providing comparative safea transverse opening or port 11 which com- 0 n.0 ty from explosion. municates with the fuel chamber 5. To the 70 With the above and other vobjects in view sleeve -3 connects an inlet fuel supply pipe my invention resides in the combination of l2 which horizontallyaligns with the openparts and elements hereinafter more particuing 11 so that by turning the valve 4 and larly described and claimed.y reference being aligning the opening 11 and supply pipe 12 had to thelaccompanying drawings wherein fuel can be admitted to the chamber 5. 75 like characters of reference indicate like In the casing 1 carried by the block 2 is an parts throughout the different views and inner primary mixing chamber 13 open at wherein the outer v end. Partially enclosing the Figpl is a vertical sectional view ofk my chamber 13 is a heating jacket 14 which is 1'30 improved carburetor illustrated as taken on .spaced therefrom to leave an intervening 80 a line 1--1 of Fig. 3. f passageway 15. Enclosing the heating jack- Fig. 2 is a longitudinal sectional view ilet 14 is a casing 16 of insulating material to lustrated as taken on a line .2*2 kof Fig. 3. maintain the heat therein and minimize Fig. 3 is a side view in elevation of the heating of the outer air in its passage 35 device partly in section. through the `main casing. rlhe casing 16 is 85 Fig. 4 is a detail view of the valve operatspaced from the jacket 14 to leave -a furing connection. c 1 ther intervening passage 17 to form a contin- Having reference to the accompanying nous passageway from the primary mixing drawing the device consists of an outer caschamber to the main air chamber formed 49 ing 1 forming a main air` passage and comby the casing 1. An inlet pipe 18 connects 90 municating with the intake manifold of an from the engine exhaust to the jacket 14, an internal combustion engine. rransversely outlet pipe 19 being provided to carry away disposedl in the casing 1 is a block 2 carrythe waste gases passing through the heating ing a cylindrical .sleeve 3 within which is jacket. Y l rotatably' mounted a valve 4*, the said casing Through the cylinder 3 and block 2 ex- 95 being lianged above and below to per-init of tends an air passage 20 which communicates securely mounting the working parts. The at one end by a funnel shaped opening in the valve 4 is centrally longitudinally bored to block 2 with the main air passage and at the form a fuel chamber -5 in communication as other end with the primary mixing chamhereinafter described with a source of fuel ber. The said passage 20 aligns with the 190 opening 1l in the valve 4 so that when the said valve is turned and the opening aligned with the air passage, air can be passed through the mixing chamber.

To permit of heating the primary mixture prior to starting the engine electric heating elements 2l are provided whichv connect with the battery and perlnit a telnporary heating or' the chamber. v

The lower extremity or stem oi the valve 4 extends beyond the casing l and has secured thereto a lever 22 connected through a pitman rod 23 on a crank pin 24 to a Wheel 25 mounted on a shaft26 and operatively connected to the crank shaft of the engine. Anysuch mechanism ofV a similar nature could be used :for the purpose producing an alternating 9()o movement of the valve 4 to present'the opening 1l in succession in alignment With. the fuel inlet pipe l2 and the air passage 20. 1

On the lowerportion of the valve 4 is ay spring 27 engaged at Vthe inner end by a disc 28 bearing against the lower flanged projectioii on the casing l and at the other end a disc 29 retained by a collar 30 secured b y a set screw tothe projection of the 4 valve 4 the said spring being adjusted to .j maintain the said valve seated in the sleeve 3. i Y v To prevent leakage of the fuel through the valve 4 a packing gland as indicated at 3l is provided. j v

In the operation of the device with the opening ll aligned with the air'passage 20, air' drawn through the main air passage by the suction of the piston in the engine is partially diverted through'the passage A2O carryingfuel with it from the chamber 5 into the primary mixing chamber Where it is vapori'ed and emitted, by Way of the intervening passageways l'and' 17 into the main air passage to be ymixed with the cool air, securing `an eilicient mixture for combiistion purposes. Vhen kthe mixture has been drawn into the engine, through operation of the. Wheel 25 by the 'engine mechanism the valve 4 is rotated closing the Vair passage 2lland'aligning the opening v11 With the fuel inlet to recharge the fuel chamber 5v ready for the next succeeding suction stroke When the opening 11 would be realigned with' the air passage v2() and a vfreshv lcharge carried through. j p

Preheating ofthe primary mixture 1s secured by the use of the electric heating 'elements use of which would be discontinued when heat from the exhaust became available. The protection of the heating jacket and enclosed chamber by an insulated covering is of particular value to insure obtaining a mixture at as low a temperature as possi-` blein order to obtain maximum power and at the same time have a thorough vaporization 'of the fuel.

During explosion of the mixture the uel chamber being exhausted the valve 4 effec- Vd isposed in said block, a rotary valve in said sleeve longitudinally bored and formed with a transverse opening, a stem disposedin said valve normally adjusted to leave a fuel chamber therein communicating with the transverse opening, a spring maintaining said stem in normal adjusted position, a cable connected to said stem for its manipulation, a primary mixing chamber in the air passage, an auxiliary air'passage through said sleeve and block communicating with the primary mixing chamber by ,way of the opening through the valve, a fuel'inlt pipe communicating with said sleeve and means for rotation of the valve to alternately register the opening in said valve with the auxiliary'air passage and fuel inlet pipe. l

2. A carburetor comprising a casing having an air inlet and a mixture outlet, a block adapted to bridge the inlet end of the casing, a cylindrical sleeve transversely disposed in the block, said block and sleeve being provided with an air passage, a valve rotatable in the sleeve, said valve having an axial bore and a transverse opening communicating therewith, a stem in the bore of said valve adjusted to leave a fuel chamber of predetermined capacity therein,a fuel inlet pipe radially disposed in the block and having communication through said sleeve with said fuel chamber, and means for rotating the valve to alternately register the opening therein ivith the fuel inlet pipe and air passage through the sleeve andbl'ock.

3. A carburetor for internal combustion engines comprising a main casing having an air inlet and ay mixture outlet, a primary mixing chamber disposed in the casing, heating elements for said rprimary mixing chamber disposed to leave an outlet therefrom, an insulated casing forsaid heating elements, a block adapted to bridge the inlet end of the main casing, said block having an air passage therethrough communicating with the primary mixing chamber, a rotary valve in the block, said valve having a fuel chamber formed therein,- and said block having a fuel inlet, and means for the operation of said valve to alternately receive fuel from the fuel inlet into the fuel chamber and discharge such fuel into Vthe air passage.

4. A carburetor including `concentrically mounted annular passages having air inlets and a mixture outlet, the inner of said passages having a primary mixing chamber 10- cated for travel ofthe air therethrough from the inlet to said passage, a jacket partiallyI surrounding the primary mixing chamber spaced therefrom and from the Wall of the v inner annular air passage to leave a circuitous outlet from the primary mixing chamber to saidinner passage, means for supplying fuel to the primary mixing chamber and means 1, for heating said jacket.

HERBERT KOWALEVSKI. 

